International Standards and Conformity Assessment for all electrical, electronic and related technologies



Reference EN 60947-4-2:2012
Title Low-voltage switchgear and controlgear - Part 4-2: Contactors and motor-starters - AC semiconductor motor controllers and starters
Project Number 22830
Abstract/Scope IEC 60947-4-2:2011 applies to a.c. semiconductor motor controllers and starters, which may include a series mechanical switching device, intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V a.c. This standard characterizes a.c. semiconductor motor controllers and starters with and without bypass means. This third edition replaces the second edition published in 1999 and its Amendments 1 (2001) and 2 (2006). It is a technical revision. This edition includes the following significant technical changes with respect to the previous edition and its amendments: - updated EMC normative references and associated requirements, - new references to IEC 60947-1, - marking of electronic relays without thermal memory, - marking of tripping time at 0 °C ambient or below, - new test requirements for limits of operation of time-delay overload relays, - new classes of overload current withstand time, - damp heat, salt mist, vibration and shock tests, - short-circuit test in the smallest enclosure, - update of the routine and sampling tests. This publication is to be read in conjunction with IEC 60947-1:2007.


Current Stage code 6060
Current Stage code date 2012-06-29
Current Stage code deadline 2012-12-29
Deadline date for vote  


Directive(s) LVD (2006/95/EC), EMC (2004/108/EC)
Order Voucher  


IEC Technical Body IEC/SC 17B
Reference Document IEC 60947-4-2:2011 (EQV)
ICS 29.130.20 - Low voltage switchgear and controlgear
Keywords Switchgear; Controlgear; LV; Contactor; Motor starter
Note 2011-05-27: Publication allocated to * Supersedes EN 60947-4-2:2000 + A1:2002 + A2:2006 * To be read in conjunction with EN 60947-1
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2012-06-29 2012-12-29 export to doc file  EN  FR  DE
5099 2011-06-22 2011-07-20  
5060 2011-05-02 2011-05-23 export to doc file  EN
5020 2011-02-25 2011-04-29  
3090 2010-10-29 2010-12-31  
5060 2010-07-05 2010-07-19 export to doc file  EN
5020 2010-01-29 2010-07-02  
1090 2010-01-26 2010-01-29  

Implementation Dates

date of Ratification (DOR) (1) 2011-06-22
date of Availability (DAV) (2) 2012-06-29
date of Announcement (DOA) (3) 2011-09-22
date of Publication (DOP) (4) 2012-12-29
date of Withdrawal (DOW) (5) 2014-06-22


Supersedes EN 60947-4-2:2000
EN 60947-4-2:2000/A1:2002
EN 60947-4-2:2000/A2:2006
Superseded by  
Normative reference (6) EN 55011:2009
EN 60034-1:2010
corr. October 2010
EN 60085:2008
EN 60269-1:2007
IEC 60410:1973
EN 60664-1:2007
EN 60947-1:2007
EN 61000 series

(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved

(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat

(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level

(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement

(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn

(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.